Presentation on theme: "Where Do People Live? Chapter 3, Section 1. Reach Into Your Background Would you like to live in a city or in the country? List some interesting things."— Presentation transcript:
Reach Into Your Background Would you like to live in a city or in the country? List some interesting things you could do if you lived far from a city. List the things you would enjoy most about a city.
What is Population Distribution? The world’s population (total number of people) is spread unevenly over the Earth’s surface. New York City vs. Sahara Desert Population distribution describes the way the population is spread out over the Earth – The reasons population is distributed as it is may seem unclear. Demographers study the populations of the world – Examine birth, marriage, death – Why do people choose to live in a certain area?
Uneven Population Distribution Landforms affect where people live Few people can live in mountainous or hot deserts with dry land Many factors make a location a good place for people to live. – Bodies of water trade and travel; fresh water (drinking and farming) Flat coastal areas – Flat, fertile soil grow food and build easily Plains and valleys
Uneven Population Distribution Other factors – Climate temperate; adequate rainfall – Abundant natural resources build houses and make products Maps on Pgs. 56-57 in textbook
Populous Continents Because of these factors, 81% of the Earth’s people (4.9 billion people) live in Asia, Europe, and North America. – These 3 continents = 53% of world’s land – Fertile soil, plains, valleys, fresh water, rich in natural resources, good climates
Not Populous Continents Other continents have smaller populations partly because it’s hard to live there. Australia = 3 million square miles (size of the continental U.S.) but only 19 million people live there – About the same number of people live in the state of New York Australia’s environment mostly desert/dry grassland; few rivers/little rainfall – Most people live along the coasts.
Not Populous Continents Africa landforms and climate limit population – 20% of the world’s land, but only 13% of world’s population. – 2 of the world’s largest deserts (north and south) – Broad bands of land with little rain – Rainforest long the equator – Many people live along narrow coasts
Population Density Population Density the average number of people who live in a square mile High density country = people crowded together Japan has one of the highest population densities in the world. – Almost all of its 126 million people live on only 16% of the land. – Tokyo more than 25,000 people per square mile
Population Density Canada = low population density – 9 people per square mile Canada is bigger than the United States, but only 31 million people live there. – (Japan has 95 million more people.) – Cool climate and short growing season affect population.
Studying Population Density Demographers divide the number of people living in a place by the number of square miles of that place. California – Population = 33,871,648 people – Land Area = 155,973 square miles – Average Population Density = 217.2 people per square mile
Studying Population Density On a world population density map, different colors show areas with heavy population. – Population Density Map vs. Physical Map worksheet Compare the landforms to the population density. Where do people tend to live? Some people do live in areas most of us would find uncomfortable – frozen Arctic regions; herders – People have developed ways of life suited to their environment over many generations.